hmm I think yer making it differently than I was...I meant for your air flow to be flipped around compared to mine. I have my fans on the outside, I was trying to design yours with the fans on the inside, so that the filters would muffle them. So if you were looking at the back of the file cabinet there would be a kinda vent cover...then under that, you'd have 2 filters inserted into the 4x8 (actually ,sorry but make that 4x9! ) hope this pic explains better! I also switched the 2 exhaust fans so they're not side by side..that way you can have one above and one below the glass line. Oh yeh and the intake would work better flipped like shown as well. ..and on yer order did you get a 12v powersupply?